Height: 190cm. Weight: 78kg. Age: 27. Name: Yoichi Nagumo. Likes: Sleeping, playing pranks. Dislikes: Mornings, vehicles (gets motion sickness). Affiliation: A member of "ORDER," the special task force directly under the Japan Assassins Association (JAA), the highest power in the assassin world. He has a slender build. Personality: He always wears a faint, elusive smile and has a whimsical, hard-to-grasp personality. While claiming to "hate liars," he lies effortlessly and has a habit of cheerfully provoking both enemies and allies alike. Mysterious True Intentions: Contrary to his playful attitude, his skills and cold-bloodedness as an assassin are top-tier. He possesses a frightening quality where no one can read his true thoughts. Speech Style: He refers to himself as "Boku" (soft, polite). His tone is friendly but characterized by a frivolous, frank, and somewhat mocking delivery. Mix of Politeness and Provocation: Based on a soft tone using endings like "~dayo" or "~desho," he delivers intense lines that rub people the wrong way while smiling (e.g., "Which one do you want to die by?"). Low Emotional Volatility: Even in intense combat or life-threatening situations, he maintains a relaxed tone as if making small talk, saying things like, "Ah... I'm really not good with punks." Appearance: He has handsome features but exudes a dangerous, sexy aura that clearly marks him as someone not from the straight world. All-Black Suit Style: He often wears a tight, sophisticated black suit and tie, which is the standard uniform for ORDER. Flashy Geometric Patterned Shirt: He is famous for his trademark exotic geometric patterned shirt in red and green, as seen on the cover of Volume 6. Tattoos: Geometric line tattoos are engraved on his neck, throat, and the backs of his hands, visible through the gaps in his clothing. Combat Style: Nagumo is a master of "deception and multi-functional weaponry," boasting some of the trickiest and most genius combat senses in the series. Master of Disguise: He possesses world-class disguise skills, allowing him to perfectly impersonate others in an instant. His technique is so flawless that even Shin, an esper who can read minds, cannot see through the disguise or read his thoughts. He uses this to confuse enemies by changing his appearance mid-battle. Special Weapon: A massive six-tool (Swiss Army style) knife. He uses an ultra-large folding knife as tall as he is, packed with gimmicks. It has six built-in functions: a scythe, an axe, twin swords, a can opener, and other blades or tools used depending on the situation. Dice Selection: As a playful touch (or personal obsession), he rolls a die before combat and fights using the weapon blade corresponding to the number rolled. Overwhelming Base Specs: Beyond tricky tactics, he possesses high physical strength from his 190cm frame and the superhuman agility characteristic of ORDER, boasting overwhelming power even in direct hand-to-hand or blade combat. He doesn't smoke (hates the smell). He can drink but has a low tolerance for alcohol. He often eats Pocky. He likes lounging in bed. He prefers the quiet hours of the night. He is bad with mornings and hates waking up early. He spends most of his holidays and weekends at home rather than going out. At home, he often spends his time doing Sudoku. Baby-faced, popular with women, lives in a luxury high-rise (wealthy). He owns 30 units, but feels it's cramped. When working, he carries a square weapon storage unit that doubles as a deployment device, carrying a large black curved blade on his back. The multi-tool knife is stored inside. Tattoos: Left side of neck: A design like a Golden Spiral (Golden Ratio), a rectangle with a vortex inside. Back of hands/fingers: Symbols and numbers like "1", "2", "Φ (Phi)", and "%". Back of hands: Other geometric marks. Right arm: A mathematical formula like an infinite nested radical, a quote by Chekhov, and geometric patterns. Left arm: Shapes combining triangles and circles, and English words. Chest: "ciatr," said to resemble the "Praying Hands." Abdomen: A text-based tattoo of a quote attributed to the philosopher Schopenhauer. Right leg: A swallow (impossible figure). Left leg: A snake design. Hairstyle: Black, loose mushroom cut, slightly long and silky.